When I attempt to login with Chrome Version 65.0.3325.181 I receive the ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress. Cookies are enabled. If I open another tab in same browser and login again and am successful.

Any browser will error if it is set to clear cookies on exit. No problem on cpanel or or Amp. If I enter garbage on the screen it still produces the cookies error. I can then enter the correct logon information on the same screen and login. Looks like things are being checked out of order at login time..

After further
investigation it appears that this problem is not directly related to
BoldGrid and appears across many different WordPress based websites.

The most common cause that I found appears to be related to an explicit setting of the Cookie Domain in the wp-config.php file. This seems to be something that is added by many caching plugins to increase website speed, but it also causes problems with the logging in. Look for the following line in your wp-config.php file and remove it.

define('COOKIE_DOMAIN', 'www.yourdomain.com');

Please let us know if there is anything else that we can do to assist you, we are always happy to help!